10 GHz室内无线体域网无线信道测量与建模

doi:10.11959/j.issn.2096-3750.2022.00259

Abstract

Abstract:

To explore the feasibility of high-frequency in indoor wireless body area network (WBAN) communication, the propagation characteristics of 10 GHz for WBAN in indoor scenario was given.Based on a large number of measurement data, the path loss, the shadow effect and the root-based delay spread of the 10 GHz were present, and a novel path loss model with the body angle was proposed, which utilizes the body angular factor to correct the path loss caused by the change of body angle.Meanwhile, the influence of receiving antenna at different heights of body on path loss was analyzed.Research results show that the path loss exponent has a quadratic function relationship with the body angle, the relationship between the path loss (PBA) caused by the body angle and the body angle can be expressed by a trigonometric function with a coefficient, which has a monotonously decreasing exponential function relationship with the distance between the receiving and sending ends.In addition, when the body is at different angles, the effect of the receiving ends in the human body on the path loss is smaller than when there is no body rotation angle.The above research results can provide the theoretical and practical basis for the use of 10 GHz indoor wireless body area network in the future.

Key words: wireless body area network, indoor environment, high frequency band, path loss, delay spread, body angle

CLC Number:

TN929.5

Qin YANG, Lihua YANG, Lulu REN, Shanhu HUANG, Jiahuan LIU. Measurement and modeling of wireless body area network propagation characteristics of indoor environment at 10 GHz[J]. Chinese Journal on Internet of Things, 2022, 6(1): 82-90.

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References 22

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VNA参数	参数数值	VNA参数	参数数值
中心频率	10 GHz	最大时延	400 ns
频率点数	801	带宽	2 GHz
频率步长	2.5 MHz	时延分辨率	0.5 ns

距离/m	系数A的值	距离/m	系数A的值
1	19.94	3.5	10.92
1.5	17.07	4	9.578
2	13.95	4.5	9.28
2.5	14.31	5	9.243
3	11.45	/	/

身体角度	路径损耗指数	身体角度	路径损耗指数
0°	1.905	225°	0.719 6
45°	1.341	270°	0.966 8
90°	0.833 9	315°	1.595
135°	0.849 7	360°	1.947
180°	0.431 6	/	/

高度/m	身体角度
高度/m	0°	90°	180°	270°
1.7(头部)	61.480 2 dB	67.265 5 dB	67.667 0 dB	68.148 0 dB
1(腰部)	57.906 0 dB	68.021 3 dB	68.130 7 dB	65.532 6 dB
0.7 (腕部)	57.648 2 dB	66.787 1 dB	67.281 2 dB	67.373 8 dB

身体角度	时延扩展均值/ns	时延扩展标准差
0°	8.272 6	1.883 2
90°	21.205 7	3.607 3
180°	22.970 0	1.595 8
270°	20.004 1	3.010 5

Measurement and modeling of wireless body area network propagation characteristics of indoor environment at 10 GHz

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身体角度	μ	σ
0°	-18.635 6	0.224 8
90°	-17.683 3	0.168 9
180°	-17.591 5	0.007 7
270°	-17.735 8	0.016 6

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